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source: code/branches/miniprojects/src/ogreceguirenderer/OgreCEGUIRenderer.cpp @ 2868

Last change on this file since 2868 was 2710, checked in by rgrieder, 16 years ago
Merged buildsystem3 containing buildsystem2 containing Adi's buildsystem branch back to the trunk. Please update the media directory if you were not using buildsystem3 before.
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File size: 27.2 KB

Line
1	/************************************************************************
2	filename: OgreCEGUIRenderer.cpp
3	created: 11/5/2004
4	author: Paul D Turner
5
6	purpose: Implementation of Renderer class for Ogre engine
7	*************************************************************************/
8	/*************************************************************************
9	Crazy Eddie's GUI System (http://www.cegui.org.uk)
10	Copyright (C)2004 - 2005 Paul D Turner (paul@cegui.org.uk)
11
12	This library is free software; you can redistribute it and/or
13	modify it under the terms of the GNU Lesser General Public
14	License as published by the Free Software Foundation; either
15	version 2.1 of the License, or (at your option) any later version.
16
17	This library is distributed in the hope that it will be useful,
18	but WITHOUT ANY WARRANTY; without even the implied warranty of
19	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
20	Lesser General Public License for more details.
21
22	You should have received a copy of the GNU Lesser General Public
23	License along with this library; if not, write to the Free Software
24	Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
25	*************************************************************************/
26
27	#include <CEGUIImagesetManager.h>
28	#include <CEGUIImageset.h>
29	#include <CEGUIImage.h>
30	#include <CEGUIExceptions.h>
31	#include <CEGUISystem.h>
32
33	#include "OgreCEGUIRenderer.h"
34	#include "OgreCEGUITexture.h"
35	#include "OgreCEGUIResourceProvider.h"
36
37	#include <OgreRenderSystem.h>
38	#include <OgreRoot.h>
39	#include <OgreHardwareBufferManager.h>
40	#include <OgreRenderWindow.h>
41
42	// Start of CEGUI namespace section
43	namespace CEGUI
44	{
45	/*************************************************************************
46	Constants definitions
47	*************************************************************************/
48	const size_t OgreCEGUIRenderer::VERTEX_PER_QUAD = 6;
49	const size_t OgreCEGUIRenderer::VERTEX_PER_TRIANGLE = 3;
50	const size_t OgreCEGUIRenderer::VERTEXBUFFER_INITIAL_CAPACITY = 256;
51	const size_t OgreCEGUIRenderer::UNDERUSED_FRAME_THRESHOLD = 50000; // halfs buffer every 8 minutes on 100fps
52
53	/*************************************************************************
54	Utility function to create a render operation and vertex buffer to render quads
55	*************************************************************************/
56	static void createQuadRenderOp(Ogre::RenderOperation &d_render_op,
57	Ogre::HardwareVertexBufferSharedPtr &d_buffer, size_t nquads)
58	{
59	using namespace Ogre;
60	// Create and initialise the Ogre specific parts required for use in rendering later.
61	d_render_op.vertexData = new VertexData;
62	d_render_op.vertexData->vertexStart = 0;
63
64	// setup vertex declaration for the vertex format we use
65	VertexDeclaration* vd = d_render_op.vertexData->vertexDeclaration;
66	size_t vd_offset = 0;
67	vd->addElement(0, vd_offset, VET_FLOAT3, VES_POSITION);
68	vd_offset += VertexElement::getTypeSize(VET_FLOAT3);
69	vd->addElement(0, vd_offset, VET_COLOUR, VES_DIFFUSE);
70	vd_offset += VertexElement::getTypeSize(VET_COLOUR);
71	vd->addElement(0, vd_offset, VET_FLOAT2, VES_TEXTURE_COORDINATES);
72
73	// create hardware vertex buffer
74	d_buffer = HardwareBufferManager::getSingleton().createVertexBuffer(vd->getVertexSize(0), nquads,
75	HardwareBuffer::HBU_DYNAMIC_WRITE_ONLY_DISCARDABLE, false);
76
77	// bind vertex buffer
78	d_render_op.vertexData->vertexBufferBinding->setBinding(0, d_buffer);
79
80	// complete render operation basic initialisation
81	d_render_op.operationType = RenderOperation::OT_TRIANGLE_LIST;
82	d_render_op.useIndexes = false;
83	}
84
85	static void destroyQuadRenderOp(Ogre::RenderOperation &d_render_op,
86	Ogre::HardwareVertexBufferSharedPtr &d_buffer)
87	{
88	delete d_render_op.vertexData;
89	d_render_op.vertexData = 0;
90	d_buffer.setNull();
91	}
92
93	/*************************************************************************
94	Constructor
95	*************************************************************************/
96	OgreCEGUIRenderer::OgreCEGUIRenderer(Ogre::RenderWindow* window, Ogre::uint8 queue_id, bool post_queue, uint max_quads)
97	{
98	constructor_impl(window, queue_id, post_queue, max_quads);
99	}
100
101
102	/*************************************************************************
103	Constructor (specifying scene manager)
104	*************************************************************************/
105	OgreCEGUIRenderer::OgreCEGUIRenderer(Ogre::RenderWindow* window, Ogre::uint8 queue_id, bool post_queue, uint max_quads, Ogre::SceneManager* scene_manager)
106	{
107	constructor_impl(window, queue_id, post_queue, max_quads);
108
109	// hook into ogre rendering system
110	setTargetSceneManager(scene_manager);
111	}
112
113
114	/*************************************************************************
115	Destructor
116	*************************************************************************/
117	OgreCEGUIRenderer::~OgreCEGUIRenderer(void)
118	{
119	setTargetSceneManager(NULL);
120
121	if (d_ourlistener)
122	{
123	delete d_ourlistener;
124	}
125
126	// cleanup vertex data we allocated in constructor
127	destroyQuadRenderOp(d_render_op, d_buffer);
128	destroyQuadRenderOp(d_direct_render_op, d_direct_buffer);
129
130	destroyAllTextures();
131	}
132
133
134	/*************************************************************************
135	add's a quad to the list to be rendered
136	*************************************************************************/
137	void OgreCEGUIRenderer::addQuad(const Rect& dest_rect, float z, const Texture* tex, const Rect& texture_rect, const ColourRect& colours, QuadSplitMode quad_split_mode)
138	{
139	// if not queueing, render directly (as in, right now!). This is used for the mouse cursor.
140	if (!d_queueing)
141	{
142	renderQuadDirect(dest_rect, z, tex, texture_rect, colours, quad_split_mode);
143	}
144	else
145	{
146	d_sorted = false;
147	QuadInfo quad;
148
149	// set quad position, flipping y co-ordinates, and applying appropriate texel origin offset
150	quad.position.d_left = dest_rect.d_left;
151	quad.position.d_right = dest_rect.d_right;
152	quad.position.d_top = d_display_area.getHeight() - dest_rect.d_top;
153	quad.position.d_bottom = d_display_area.getHeight() - dest_rect.d_bottom;
154	quad.position.offset(d_texelOffset);
155
156	// convert quad co-ordinates for a -1 to 1 co-ordinate system.
157	quad.position.d_left /= (d_display_area.getWidth() * 0.5f);
158	quad.position.d_right /= (d_display_area.getWidth() * 0.5f);
159	quad.position.d_top /= (d_display_area.getHeight() * 0.5f);
160	quad.position.d_bottom /= (d_display_area.getHeight() * 0.5f);
161	quad.position.offset(Point(-1.0f, -1.0f));
162
163	quad.z = -1 + z;
164	quad.texture = ((OgreCEGUITexture*)tex)->getOgreTexture();
165	quad.texPosition = texture_rect;
166
167	// covert colours for ogre, note that top / bottom are switched.
168	quad.topLeftCol = colourToOgre(colours.d_bottom_left);
169	quad.topRightCol = colourToOgre(colours.d_bottom_right);
170	quad.bottomLeftCol = colourToOgre(colours.d_top_left);
171	quad.bottomRightCol = colourToOgre(colours.d_top_right);
172
173	// set quad split mode
174	quad.splitMode = quad_split_mode;
175
176	d_quadlist.insert(quad);
177	}
178	}
179
180
181
182	/*************************************************************************
183	perform final rendering for all queued renderable quads.
184	*************************************************************************/
185	void OgreCEGUIRenderer::doRender(void)
186	{
187	// Render if overlays enabled and the quad list is not empty
188	if (d_render_sys->_getViewport()->getOverlaysEnabled() && !d_quadlist.empty())
189	{
190	/// Quad list needs to be sorted and thus the vertex buffer rebuilt. If not, we can
191	/// reuse the vertex buffer resulting in a nice speed gain.
192	if(!d_sorted)
193	{
194	sortQuads();
195	/// Resize vertex buffer if it is too small
196	size_t size = d_buffer->getNumVertices();
197	size_t requestedSize = d_quadlist.size()*VERTEX_PER_QUAD;
198	if(size < requestedSize)
199	{
200	/// Double buffer size until smaller than requested size
201	while(size < requestedSize)
202	size = size * 2;
203	/// Reallocate the buffer
204	destroyQuadRenderOp(d_render_op, d_buffer);
205	createQuadRenderOp(d_render_op, d_buffer, size);
206	}
207	else if(requestedSize < size/2 && d_underused_framecount >= UNDERUSED_FRAME_THRESHOLD)
208	{
209	/// Resize vertex buffer if it has been to big for too long
210	size = size / 2;
211	destroyQuadRenderOp(d_render_op, d_buffer);
212	createQuadRenderOp(d_render_op, d_buffer, size);
213	/// Reset underused framecount so it takes another UNDERUSED_FRAME_THRESHOLD to half again
214	d_underused_framecount = 0;
215	}
216	/// Fill the buffer
217	QuadVertex* buffmem;
218	buffmem = (QuadVertex*)d_buffer->lock(Ogre::HardwareVertexBuffer::HBL_DISCARD);
219	// iterate over each quad in the list
220	for (QuadList::iterator i = d_quadlist.begin(); i != d_quadlist.end(); ++i)
221	{
222	const QuadInfo& quad = (*i);
223	// setup Vertex 1...
224	buffmem->x = quad.position.d_left;
225	buffmem->y = quad.position.d_bottom;
226	buffmem->z = quad.z;
227	buffmem->diffuse = quad.topLeftCol;
228	buffmem->tu1 = quad.texPosition.d_left;
229	buffmem->tv1 = quad.texPosition.d_bottom;
230	++buffmem;
231
232	// setup Vertex 2...
233
234	// top-left to bottom-right diagonal
235	if (quad.splitMode == TopLeftToBottomRight)
236	{
237	buffmem->x = quad.position.d_right;
238	buffmem->y = quad.position.d_bottom;
239	buffmem->z = quad.z;
240	buffmem->diffuse = quad.topRightCol;
241	buffmem->tu1 = quad.texPosition.d_right;
242	buffmem->tv1 = quad.texPosition.d_bottom;
243	}
244	// bottom-left to top-right diagonal
245	else
246	{
247	buffmem->x = quad.position.d_right;
248	buffmem->y = quad.position.d_top;
249	buffmem->z = quad.z;
250	buffmem->diffuse = quad.bottomRightCol;
251	buffmem->tu1 = quad.texPosition.d_right;
252	buffmem->tv1 = quad.texPosition.d_top;
253	}
254	++buffmem;
255
256	// setup Vertex 3...
257	buffmem->x = quad.position.d_left;
258	buffmem->y = quad.position.d_top;
259	buffmem->z = quad.z;
260	buffmem->diffuse = quad.bottomLeftCol;
261	buffmem->tu1 = quad.texPosition.d_left;
262	buffmem->tv1 = quad.texPosition.d_top;
263	++buffmem;
264
265	// setup Vertex 4...
266	buffmem->x = quad.position.d_right;
267	buffmem->y = quad.position.d_bottom;
268	buffmem->z = quad.z;
269	buffmem->diffuse = quad.topRightCol;
270	buffmem->tu1 = quad.texPosition.d_right;
271	buffmem->tv1 = quad.texPosition.d_bottom;
272	++buffmem;
273
274	// setup Vertex 5...
275	buffmem->x = quad.position.d_right;
276	buffmem->y = quad.position.d_top;
277	buffmem->z = quad.z;
278	buffmem->diffuse = quad.bottomRightCol;
279	buffmem->tu1 = quad.texPosition.d_right;
280	buffmem->tv1 = quad.texPosition.d_top;
281	++buffmem;
282
283	// setup Vertex 6...
284
285	// top-left to bottom-right diagonal
286	if (quad.splitMode == TopLeftToBottomRight)
287	{
288	buffmem->x = quad.position.d_left;
289	buffmem->y = quad.position.d_top;
290	buffmem->z = quad.z;
291	buffmem->diffuse = quad.bottomLeftCol;
292	buffmem->tu1 = quad.texPosition.d_left;
293	buffmem->tv1 = quad.texPosition.d_top;
294	}
295	// bottom-left to top-right diagonal
296	else
297	{
298	buffmem->x = quad.position.d_left;
299	buffmem->y = quad.position.d_bottom;
300	buffmem->z = quad.z;
301	buffmem->diffuse = quad.topLeftCol;
302	buffmem->tu1 = quad.texPosition.d_left;
303	buffmem->tv1 = quad.texPosition.d_bottom;
304	}
305	++buffmem;
306	}
307
308	// ensure we leave the buffer in the unlocked state
309	d_buffer->unlock();
310	}
311
312	/// Render the buffer
313	d_bufferPos = 0;
314	bool first = true;
315
316	// Iterate over each quad in the list and render it
317	QuadList::iterator i = d_quadlist.begin();
318	while(i != d_quadlist.end())
319	{
320
321	d_currTexture = i->texture;
322	d_render_op.vertexData->vertexStart = d_bufferPos;
323	for (; i != d_quadlist.end(); ++i)
324	{
325	const QuadInfo& quad = (*i);
326	if (d_currTexture != quad.texture)
327	{
328	/// If it has a different texture, render this quad in next operation
329	/// also need to reset render states
330	first = true;
331	break;
332	}
333	d_bufferPos += VERTEX_PER_QUAD;
334	}
335	d_render_op.vertexData->vertexCount = d_bufferPos - d_render_op.vertexData->vertexStart;
336	/// Set texture, and do the render
337	d_render_sys->_setTexture(0, true, d_currTexture);
338	if (first)
339	{
340	initRenderStates();
341	first = false;
342	}
343	d_render_sys->_render(d_render_op);
344	}
345
346	}
347	/// Count frames to check if utilization of vertex buffer was below half the capacity for 500,000 frames
348	if(d_bufferPos < d_buffer->getNumVertices()/2)
349	d_underused_framecount++;
350	else
351	d_underused_framecount = 0;
352	}
353
354
355	/*************************************************************************
356	clear the queue
357	*************************************************************************/
358	void OgreCEGUIRenderer::clearRenderList(void)
359	{
360	d_sorted = true;
361	d_quadlist.clear();
362	}
363
364
365	/*************************************************************************
366	create an empty texture
367	*************************************************************************/
368	Texture* OgreCEGUIRenderer::createTexture(void)
369	{
370	OgreCEGUITexture* tex = new OgreCEGUITexture(this);
371	d_texturelist.push_back(tex);
372	return tex;
373	}
374
375
376	/*************************************************************************
377	create a texture and load it with the specified file.
378	*************************************************************************/
379	Texture* OgreCEGUIRenderer::createTexture(const String& filename, const String& resourceGroup)
380	{
381	OgreCEGUITexture* tex = (OgreCEGUITexture*)createTexture();
382	tex->loadFromFile(filename, resourceGroup);
383
384	return tex;
385	}
386
387
388	/*************************************************************************
389	create a texture and set it to the specified size
390	*************************************************************************/
391	Texture* OgreCEGUIRenderer::createTexture(float size)
392	{
393	OgreCEGUITexture* tex = (OgreCEGUITexture*)createTexture();
394	tex->setOgreTextureSize((uint)size);
395
396	return tex;
397	}
398
399
400	/*************************************************************************
401	destroy the given texture
402	*************************************************************************/
403	void OgreCEGUIRenderer::destroyTexture(Texture* texture)
404	{
405	if (texture != NULL)
406	{
407	OgreCEGUITexture* tex = (OgreCEGUITexture*)texture;
408
409	d_texturelist.remove(tex);
410	delete tex;
411	}
412	}
413
414
415	/*************************************************************************
416	destroy all textures still active
417	*************************************************************************/
418	void OgreCEGUIRenderer::destroyAllTextures(void)
419	{
420	while (!d_texturelist.empty())
421	{
422	destroyTexture(*(d_texturelist.begin()));
423	}
424	}
425
426
427	/*************************************************************************
428	setup states etc
429	*************************************************************************/
430	void OgreCEGUIRenderer::initRenderStates(void)
431	{
432	using namespace Ogre;
433
434	// set-up matrices
435	d_render_sys->_setWorldMatrix(Matrix4::IDENTITY);
436	d_render_sys->_setViewMatrix(Matrix4::IDENTITY);
437	d_render_sys->_setProjectionMatrix(Matrix4::IDENTITY);
438
439	// initialise render settings
440	d_render_sys->setLightingEnabled(false);
441	d_render_sys->_setDepthBufferParams(false, false);
442	d_render_sys->_setDepthBias(0, 0);
443	d_render_sys->_setCullingMode(CULL_NONE);
444	d_render_sys->_setFog(FOG_NONE);
445	d_render_sys->_setColourBufferWriteEnabled(true, true, true, true);
446	d_render_sys->unbindGpuProgram(GPT_FRAGMENT_PROGRAM);
447	d_render_sys->unbindGpuProgram(GPT_VERTEX_PROGRAM);
448	d_render_sys->setShadingType(SO_GOURAUD);
449	d_render_sys->_setPolygonMode(PM_SOLID);
450
451	// initialise texture settings
452	d_render_sys->_setTextureCoordCalculation(0, TEXCALC_NONE);
453	d_render_sys->_setTextureCoordSet(0, 0);
454	d_render_sys->_setTextureUnitFiltering(0, FO_LINEAR, FO_LINEAR, FO_POINT);
455	d_render_sys->_setTextureAddressingMode(0, d_uvwAddressMode);
456	d_render_sys->_setTextureMatrix(0, Matrix4::IDENTITY);
457	d_render_sys->_setAlphaRejectSettings(CMPF_ALWAYS_PASS, 0);
458	d_render_sys->_setTextureBlendMode(0, d_colourBlendMode);
459	d_render_sys->_setTextureBlendMode(0, d_alphaBlendMode);
460	d_render_sys->_disableTextureUnitsFrom(1);
461
462	// enable alpha blending
463	d_render_sys->_setSceneBlending(SBF_SOURCE_ALPHA, SBF_ONE_MINUS_SOURCE_ALPHA);
464	}
465
466
467
468	/*************************************************************************
469	sort quads list according to texture
470	*************************************************************************/
471	void OgreCEGUIRenderer::sortQuads(void)
472	{
473	if (!d_sorted)
474	{
475	d_sorted = true;
476	}
477
478	}
479
480	/*************************************************************************
481	render a quad directly to the display
482	*************************************************************************/
483	void OgreCEGUIRenderer::renderQuadDirect(const Rect& dest_rect, float z, const Texture* tex, const Rect& texture_rect, const ColourRect& colours, QuadSplitMode quad_split_mode)
484	{
485	if (d_render_sys->_getViewport()->getOverlaysEnabled())
486	{
487	z = -1 + z;
488
489	Rect final_rect;
490
491	// set quad position, flipping y co-ordinates, and applying appropriate texel origin offset
492	final_rect.d_left = dest_rect.d_left;
493	final_rect.d_right = dest_rect.d_right;
494	final_rect.d_top = d_display_area.getHeight() - dest_rect.d_top;
495	final_rect.d_bottom = d_display_area.getHeight() - dest_rect.d_bottom;
496	final_rect.offset(d_texelOffset);
497
498	// convert quad co-ordinates for a -1 to 1 co-ordinate system.
499	final_rect.d_left /= (d_display_area.getWidth() * 0.5f);
500	final_rect.d_right /= (d_display_area.getWidth() * 0.5f);
501	final_rect.d_top /= (d_display_area.getHeight() * 0.5f);
502	final_rect.d_bottom /= (d_display_area.getHeight() * 0.5f);
503	final_rect.offset(Point(-1.0f, -1.0f));
504
505	// convert colours for ogre, note that top / bottom are switched.
506	uint32 topLeftCol = colourToOgre(colours.d_bottom_left);
507	uint32 topRightCol = colourToOgre(colours.d_bottom_right);
508	uint32 bottomLeftCol = colourToOgre(colours.d_top_left);
509	uint32 bottomRightCol= colourToOgre(colours.d_top_right);
510
511	QuadVertex* buffmem = (QuadVertex*)d_direct_buffer->lock(Ogre::HardwareVertexBuffer::HBL_DISCARD);
512
513	// setup Vertex 1...
514	buffmem->x = final_rect.d_left;
515	buffmem->y = final_rect. d_bottom;
516	buffmem->z = z;
517	buffmem->diffuse = topLeftCol;
518	buffmem->tu1 = texture_rect.d_left;
519	buffmem->tv1 = texture_rect.d_bottom;
520	++buffmem;
521
522	// setup Vertex 2...
523
524	// top-left to bottom-right diagonal
525	if (quad_split_mode == TopLeftToBottomRight)
526	{
527	buffmem->x = final_rect.d_right;
528	buffmem->y = final_rect.d_bottom;
529	buffmem->z = z;
530	buffmem->diffuse = topRightCol;
531	buffmem->tu1 = texture_rect.d_right;
532	buffmem->tv1 = texture_rect.d_bottom;
533	++buffmem;
534	}
535	// bottom-left to top-right diagonal
536	else
537	{
538	buffmem->x = final_rect.d_right;
539	buffmem->y = final_rect.d_top;
540	buffmem->z = z;
541	buffmem->diffuse = bottomRightCol;
542	buffmem->tu1 = texture_rect.d_right;
543	buffmem->tv1 = texture_rect.d_top;
544	++buffmem;
545	}
546
547	// setup Vertex 3...
548	buffmem->x = final_rect.d_left;
549	buffmem->y = final_rect.d_top;
550	buffmem->z = z;
551	buffmem->diffuse = bottomLeftCol;
552	buffmem->tu1 = texture_rect.d_left;
553	buffmem->tv1 = texture_rect.d_top;
554	++buffmem;
555
556	// setup Vertex 4...
557	buffmem->x = final_rect.d_right;
558	buffmem->y = final_rect.d_bottom;
559	buffmem->z = z;
560	buffmem->diffuse = topRightCol;
561	buffmem->tu1 = texture_rect.d_right;
562	buffmem->tv1 = texture_rect.d_bottom;
563	++buffmem;
564
565	// setup Vertex 5...
566	buffmem->x = final_rect.d_right;
567	buffmem->y = final_rect.d_top;
568	buffmem->z = z;
569	buffmem->diffuse = bottomRightCol;
570	buffmem->tu1 = texture_rect.d_right;
571	buffmem->tv1 = texture_rect.d_top;
572	++buffmem;
573
574	// setup Vertex 6...
575
576	// top-left to bottom-right diagonal
577	if (quad_split_mode == TopLeftToBottomRight)
578	{
579	buffmem->x = final_rect.d_left;
580	buffmem->y = final_rect.d_top;
581	buffmem->z = z;
582	buffmem->diffuse = bottomLeftCol;
583	buffmem->tu1 = texture_rect.d_left;
584	buffmem->tv1 = texture_rect.d_top;
585	}
586	// bottom-left to top-right diagonal
587	else
588	{
589	buffmem->x = final_rect.d_left;
590	buffmem->y = final_rect.d_bottom;
591	buffmem->z = z;
592	buffmem->diffuse = topLeftCol;
593	buffmem->tu1 = texture_rect.d_left;
594	buffmem->tv1 = texture_rect.d_bottom;
595	}
596
597	d_direct_buffer->unlock();
598
599	//
600	// perform rendering...
601	//
602	d_render_sys->_setTexture(0, true, ((OgreCEGUITexture*)tex)->getOgreTexture()->getName());
603	initRenderStates();
604	d_direct_render_op.vertexData->vertexCount = VERTEX_PER_QUAD;
605	d_render_sys->_render(d_direct_render_op);
606	}
607
608	}
609
610	/*************************************************************************
611	convert ARGB colour value to whatever the Ogre render system is
612	expecting.
613	*************************************************************************/
614	uint32 OgreCEGUIRenderer::colourToOgre(const colour& col) const
615	{
616	Ogre::ColourValue cv(col.getRed(), col.getGreen(), col.getBlue(), col.getAlpha());
617
618	uint32 final;
619	d_render_sys->convertColourValue(cv, &final);
620
621	return final;
622	}
623
624
625	/*************************************************************************
626	Set the scene manager to be used for rendering the GUI.
627	*************************************************************************/
628	void OgreCEGUIRenderer::setTargetSceneManager(Ogre::SceneManager* scene_manager)
629	{
630	// unhook from current scene manager.
631	if (d_sceneMngr != NULL)
632	{
633	d_sceneMngr->removeRenderQueueListener(d_ourlistener);
634	d_sceneMngr = NULL;
635	}
636
637	// hook new scene manager if that is not NULL
638	if (scene_manager != NULL)
639	{
640	d_sceneMngr = scene_manager;
641	d_sceneMngr->addRenderQueueListener(d_ourlistener);
642	}
643
644	}
645
646
647	/*************************************************************************
648	Set the target render queue for GUI rendering.
649	*************************************************************************/
650	void OgreCEGUIRenderer::setTargetRenderQueue(Ogre::uint8 queue_id, bool post_queue)
651	{
652	d_queue_id = queue_id;
653	d_post_queue = post_queue;
654
655	if (d_ourlistener != NULL)
656	{
657	d_ourlistener->setTargetRenderQueue(queue_id);
658	d_ourlistener->setPostRenderQueue(post_queue);
659	}
660
661	}
662
663
664	/*************************************************************************
665	perform main work of the constructor
666	*************************************************************************/
667	void OgreCEGUIRenderer::constructor_impl(Ogre::RenderWindow* window, Ogre::uint8 queue_id, bool post_queue, uint max_quads)
668	{
669	using namespace Ogre;
670
671	// initialise the renderer fields
672	d_queueing = true;
673	d_queue_id = queue_id;
674	d_currTexture.isNull();
675	d_post_queue = post_queue;
676	d_sceneMngr = NULL;
677	d_bufferPos = 0;
678	d_sorted = true;
679	d_ogre_root = Root::getSingletonPtr();
680	d_render_sys = d_ogre_root->getRenderSystem();
681	// set ID string
682	d_identifierString = "CEGUI::OgreRenderer - Official Ogre based renderer module for CEGUI";
683
684	// Create and initialise the Ogre specific parts required for use in rendering later.
685	// Main GUI
686	createQuadRenderOp(d_render_op, d_buffer, VERTEXBUFFER_INITIAL_CAPACITY);
687	d_underused_framecount = 0;
688
689	// Mouse cursor
690	createQuadRenderOp(d_direct_render_op, d_direct_buffer, VERTEX_PER_QUAD);
691
692	// Discover display settings and setup d_display_area
693	d_display_area.d_left = 0;
694	d_display_area.d_top = 0;
695	d_display_area.d_right = window->getWidth();
696	d_display_area.d_bottom = window->getHeight();
697
698	// initialise required texel offset
699	d_texelOffset = Point((float)d_render_sys->getHorizontalTexelOffset(), -(float)d_render_sys->getVerticalTexelOffset());
700
701	// create listener which will handler the rendering side of things for us.
702	d_ourlistener = new CEGUIRQListener(this, queue_id, post_queue);
703
704	// Initialise blending modes to be used.
705	d_colourBlendMode.blendType = Ogre::LBT_COLOUR;
706	d_colourBlendMode.source1 = Ogre::LBS_TEXTURE;
707	d_colourBlendMode.source2 = Ogre::LBS_DIFFUSE;
708	d_colourBlendMode.operation = Ogre::LBX_MODULATE;
709
710	d_alphaBlendMode.blendType = Ogre::LBT_ALPHA;
711	d_alphaBlendMode.source1 = Ogre::LBS_TEXTURE;
712	d_alphaBlendMode.source2 = Ogre::LBS_DIFFUSE;
713	d_alphaBlendMode.operation = Ogre::LBX_MODULATE;
714
715	d_uvwAddressMode.u = Ogre::TextureUnitState::TAM_CLAMP;
716	d_uvwAddressMode.v = Ogre::TextureUnitState::TAM_CLAMP;
717	d_uvwAddressMode.w = Ogre::TextureUnitState::TAM_CLAMP;
718	}
719
720
721	/*************************************************************************
722	Create a texture from an existing Ogre::TexturePtr object
723	*************************************************************************/
724	Texture* OgreCEGUIRenderer::createTexture(Ogre::TexturePtr& texture)
725	{
726	OgreCEGUITexture* t = (OgreCEGUITexture*)createTexture();
727
728	if (!texture.isNull())
729	{
730	t->setOgreTexture(texture);
731	}
732
733	return t;
734
735	}
736
737	/*************************************************************************
738	Create a resource provider object
739	*************************************************************************/
740	ResourceProvider* OgreCEGUIRenderer::createResourceProvider(void)
741	{
742	d_resourceProvider = new OgreCEGUIResourceProvider();
743	return d_resourceProvider;
744	}
745
746	/*************************************************************************
747	Set the size of the display in pixels.
748	*************************************************************************/
749	void OgreCEGUIRenderer::setDisplaySize(const Size& sz)
750	{
751	if (d_display_area.getSize() != sz)
752	{
753	d_display_area.setSize(sz);
754
755	EventArgs args;
756	fireEvent(EventDisplaySizeChanged, args, EventNamespace);
757	}
758
759	}
760
761	/*************************************************************************
762	Callback from Ogre invoked before other stuff in our target queue
763	is rendered
764	*************************************************************************/
765	void CEGUIRQListener::renderQueueStarted(Ogre::uint8 id, const Ogre::String& invocation,
766	bool& skipThisQueue)
767	{
768	if ((!d_post_queue) && (d_queue_id == id))
769	{
770	CEGUI::System::getSingleton().renderGUI();
771	}
772
773	}
774
775
776	/*************************************************************************
777	Callback from Ogre invoked after other stuff in our target queue
778	is rendered
779	*************************************************************************/
780	void CEGUIRQListener::renderQueueEnded(Ogre::uint8 id, const Ogre::String& invocation, bool& repeatThisQueue)
781	{
782	if ((d_post_queue) && (d_queue_id == id))
783	{
784	CEGUI::System::getSingleton().renderGUI();
785	}
786
787	}
788
789	} // End of CEGUI namespace section

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